Skratch Labs' Hydration Sport Drink Mix features all natural ingredients to replenish the fluids and electrolytes you lose during intense physical exertion. Dr. Allen Lim developed this unique formula for pro riders plagued by headaches due to nutrition/hydration issues and the upset stomachs caused by the artificial ingredients found in most attempts to address those issues. Lim found that the key to maintaining hydration wasn't simply electrolyte replacement, but rather it relied on regulating the body's sodium levels, which is why Skratch's Sport Hydration Mix contains a level of sodium that is similar to many emergency-grade rehydration formulas. And because Lim's formula uses all natural ingredients and is only flavored with real fruit, it's easy on your stomach while providing just enough calories to refuel working muscles. It also tastes great, largely because it wasn't formulated with a list of chemicals we can't pronounce. While we love that simplicity, we also love improvements, and this new formula contains 10% more electrolytes to replace what is lost in sweat.